Fan attachment



Aug 1929., c. D. RYDER FAN ATTACHMENT Filed Oct. 20, 1927 lti t ll

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ateted thug, ll lit STATES 1,723,953 PATENT OFFlCE.

GlHlihlEtLES D. RYDER, 0F COVINGTON, KENTUCKY, ASSIGNOR TO THECINCINNATI VIC- TOR CQMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

FAN ATTACHMENT.

Application filed October 1927. Serial No. 227,552.

This inventionrelates to fans, and is particularly directed to a devicefor controlling the air current created by the fan.

Tt is an object of this invention to provide a series of vanes arrangedin spaced'relation in front of the rotary blades of the fan, the vanesbeing outwardly curved from each side of the central axis of the bladesfor laterally deflecting a percentage of the air current set up by thefan.

Another object is to assemble these vanes as an attachment device whichis readily secured to the cage or guard of the fan.

Still another object is to provide a deliector device of suchconstruction and curvature as to afitord efficient lateral deflection ofthe air current while reducing to a minimum the weight and amount ofmaterial used to achieve this result.

still another object is to provide a deflector device which willsupersede the oscillating type of fan.

Further objects and advantages will be more fully set forth in thedescription of the accompanying drawings forming a part of thisspecification, in which:

Figure 1 is a front elevation of the fan, showing the deflector deviceattached to the wire guard or cage of the fan.

Figure 2 is a side elevation of Figure l disclosing the attachment meansfor securing the device to the wire cage or guard.

igure 3 is an enlarged top view of the deflector device showing itdetached from the fan structure.

Referring to the drawings, a type of fan to which the invention may beapplied is indicated generally at 1. This fan structure comprises a base2, a motor 3, rotary blades d, and a wire cage or guard 5 surroundingthe blades and attached to the motor as at 6.

Generally speaking, the device herein concerned comprises an annularframe or ring 'l' a parallel series of vanes 8 disposed across the ring,and a plurality of clips 9 secured to the ring for attaching the deviceto the fan guard. The ring 8 is formed of a length of strap iron bentinto a circular shape having its ends joined together as at 10. Thevarious parts may be secured together by any desired means, thepreferable means, however, being spot welding.

The vanes 8 are of the same respective curvature and width centrally butdecrease in length outward from the center of the device due to theirarrangement within the ring 8. These vanes are preferably formed fromthin sheet metal. being perfectly straight on the rear edge 11 andconvexly curved on the forward edge 12 from the ends or points ofattachment 18 on the ring, thus forming substantially segments of acircle. The ends 13 of the respective vanes are turned inwardly at anangle to correspond to the inner contour of the ring for a snug fitthereagainst.

The vanes as regarded in cross section are curved outwardly in sets fromeach side of the center of the device, the device and rotary blade shaft14: being concentric. The arrangement of the vanes across thedevice issuch that there is considerable clearance between each vane for allowingthe unobstructed passage of the direct air current between the vanes.The clips 9 are secured to the outer face of the ring and have theirinner or attaching ends formed to spring over the outer ring of the'fanblade guard. The device may be attached to the fan guard so as todispose the vanes either horizontally or vertically, or at anyintermediate angle, depending upon the required directioning of thediverted "air currents.

The deflector vanes as disclosed are mounted on a narrow ring as thebody of the device, the ends of the vanes being narrowed down tocorrespond to the width of the ring, while the central portions of thevanes are of considerable width providing the necessary wide curvatureas the deflecting surface. The construction used reduces weight andachieves improved circulation and diffusion of the air current set up bythe fan.

Considerable space is provided centrally of' the device between theoppositely curved sets of vanes and the vanes of the respective sets arespaced apart. This positioning of the vanes allows the direct aircurrent to pass through in sufficient volume to provide a moderatedirect breeze and laterally deflects, through the medium of the vanes,the remainder of the current for air circulation at the sides andforwardly of the fan.

The air from a fan does not leave the fan in the shape of a truetruncated cone, but there is a greater concentration of air at thecenter of the fan than at its edges. It will be seen that my improveddeflecting vane is wider at its center than at its ends, and

tively narrow ring,

will, therefore, serve to effectively break up this concentration of theair currents by rea son of the fact that the air from-the center of thefan will be deflected further than that from the portion of the fanadjacent its periphery.

Having described my invention, I claim: 1.- In combination with a bladeguard o a fan, a deflector, com ising, a ring, a series of vanes securedto an across said ring, said ring being of relatively narrow width, thevanes havin wide intermediate deflecting portions am? narrow endsattached to the ring, and clips on said ring for detachably securingsaid deflector to the blade guard. 2. A fan attachment comprising arelameans to secure said ring to a fan guard, and air deflectin vanesarranged in said rin 'said vanes eing substantially segments of acircle, the curved edge of said vanes being arranged away from said fan,whereby said vanes are widest adjacent their centers and decrease inwidth towards their ends, the ends of the vanes being secured to thering, and said vanes being curved transversely away from the center ofi: the ring.

3'. A fan attachment comprising a series of spaced vanes adapted to bearranged in front of a fan and to extend across the entire face thereof,said vanes being substantially segments'of a circle, the vanes beingwidest adjacent their centers, and decreasing in width towards theirends, said vanes bein curved transversely away from the center 0 thefan. 35

-In witness whereof, I hereunto subscribe my name.

CHARLES D. RYDER.

